Subject cannot automatically limit which of these?

Question

Subject cannot automatically limit which of these?
intended audience
intended purpose
whether a message is timely
whether a message is topical
whether a message is effective

Writeacher · Answer

Subject of what? Subject of a sentence? Subject of an investigation? Subject of an essay? What?

Savannah · Answer

OCR: Intended Audience

Savannah · Answer

I lied! It's actually: Whether a message is effective